Tyco Safety Products/Sensormatic UMPHSR-R Manuel D’Utilisation

2

OPERATING GUIDE

PHASING TOOL (900MHZ)

8000-2574-22, REV. A

a.  Set the first transmitter to the same channel

as the receiver.

b.  Locate a power outlet at or near the

reference system and plug in the first
transmitter.

 

CAUTION: Make sure the power select fuse on

both transmitters is set for the correct ac
voltage. To change the setting, use the
blade of a small scewdriver to pry out the
power select module. Rotate and insert the
module so that the correct voltage (115,
125, 230, 250) is opposite the arrow.

 

Locate the transmitter in a clear and open area

that will provide the best possible line of site
to all of the systems to be phased.

 

Note:  Avoid locating the transmitter in the

ceiling or any metal enclosed areas.

c.  Set the switches of the transmitter to

Normal mode and ABC Signal.

a.  On the receiver's signal strength indicator,

you should see a steady, strong signal.

b.  Connect the output of the receiver to

channel 1 of an oscilloscope with the short
BNC cable and the sense coil to channel 2
with the long BNC cable.

c.  Verify that channel 1 shows the proper ABC

signal from the transmitter. (One wide,
3ms, negative going pulse followed by two
narrow, 1ms, negative going pulses with a
separation of 5.556ms for 60Hz and
6.667ms for 50Hz.)  Best viewed at
1ms/division.

a.  Beginning at the transmitter antenna of the

reference system, place the sense coil
against or near the transmitter coil. Position
the coil for the strongest possible signal.

 

Note:  The sense coil is a cylindrical coil and is

very orientation specific. It must be in the
proper orientation for maximum sensitivity.

b.  Verify that channel 2 shows the proper

transmitter burst signal.

 

Note:  In general, the reference system should

be one with No Delay. If the system has
been phased, you should consider first
setting it back to the No Delay default.

c.  While watching the receiver signal and

burst signal on the oscilloscope, adjust the
Phase Adjustment pot on the first
transmitter so that the burst signal starts at
the Falling Edge (beginning) of any one of
the three pulses. Use the “180

°

 Flip” switch

if more adjustment range is needed.

 

Note: In general, you will want to make a

coarse adjustment with scope at a large
scale (e.g. 500

µ

s or 1ms/division) and then

fine tune the adjustment with the scope at
50

µ

s/division.

 

Note:  Depending on the type of system being

adjusted, there will be some timing jitter in
the signals displayed. In this case, adjust
the transmitter such that the jitter is divided
equally between leading and lagging.
(Average the variation.)

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